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MG TD TF 1500 - Firing Problems
|Hi, I have just completed a rebuild of a 1250cc, 1954 mgtf. I have covered 2,000 miles without incident. However, the car has now developed a firing problem. When the gets hot, or on most times when I have filled up with petrol, (but not always) the engine starts to miss fire on cy 3 & 4. I have replaced the plugs, points, condenserand and coil, but this has not cured the fault. If I am driving the car when the fault occures (very difficult on two cylinders) there will be a loud bachfire in the exhaust box and the car will immediately fire on all 4 cy. I have measured the compression on all 4 cy and they are OK. I have looked at the rear carb and that appears OK. Has any one, out there, got any sugestions for me.|
|How about the distributor cap? Look for some tracking on the inside of it.|
|Do you have your distributer grounded to the engine? The clamp does not adequately serve for that function under some conditions.|
|Paul - Check that the fuel filler cap is venting properly. If it isn't the tank will develop a vacuum as the fuel is used and cause starvation. this will be particularly bad after a fill up since there is very little head of air left in the tank. For further fuel delivery troubleshooting tips, see my article at: http://www.custompistols.com/cars/dave/ddFuelDeliveryTroubleshooting.htm|
Your distributor on the later XPAG engine used in the late TD/early TF uses a cotter botl to hold hte distributor in place and it provides a positive grond to the distributor, but the other ignition suggestions are worth checking out. Cheers - Dave
This thread was discussed on 01/07/2007
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